Improvement in burglar-alarms



a F. KR'UPP.

' Burglar-Alarms.

No. 195934. Patented Oct. 9, 1877.

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FRANK KRUPP, OF NEW ORLEANS, LOUISIANA.

IM PROVEMENT IN BU RGLAR-ALARMS.

Specification forming part of Letters Patent No. 195,934, dated October9, 1877; application filed September 3, 1877.

To all whom it may concern:

Be it known that I, FRANK KRUPP, a resident of the city of New Orleansand State of Louisiana, have invented a certain new and usefulImprovement in Burglar-Alarms and scare ofi an intruder, even though itdoes not attract the attention or waken the occupants of the room orbuilding wherein the arrangement is employed.

in order to fully understand the nature of my invention attention iscalled to the accom panying drawing, whereon Figure 1 represents a frontview of the apparatus, with trigger set. Fig. 2 represents the apparatusafter the springing of its trigger, and Fig. 3 is a perspective of thetrip, or that portion which is attached to the casing of the door.

A is a box, provided with a door, B, having a glass center, 0, throughwhich the lamp, when ignited, may throw forth its rays. D is a lever,one end of which is pivoted or otherwise held in a bracket, E, while itsopposite end projects through an elongated slot, which is cut in one endof the box A and in a metal casing, F, that is fastened to the outsidethereof. To the lever D is secured a hook, a, for operating, as willhereinafter be described, a rocking device, 0, having pointed ends forentering perforations in the upper and lower sides of the sliding rod H,so that the latter may be held in either its inward or outward position.0 c are guides for the aforesaid rod, and it is in the latter that therocking device above mentioned has its bearing. I is a spring, the freeend of which operates against the rear end of the bar H, so as to throwit forward, until checked by the stop d coming in contact with the guide0. The

front end of the said bar H is provided with a shoulder, e, to check itsbackward motion, and with a pair of lugs, f f, and spring-yoke g forholding a match, as at h, for lighting the lamp K. The match itself isignited by sliding over the sand-paper or roughened surface of a block,L, that is supported by strips M projecting upward from the sides of thesaid lamp.

Around the upper horizontal portion of the hook to is twisted a wirerod, i, one end of which is secured in the lever l), as at *6, while theopposite end thereof projects for ward and is provided with ahammer-head, k, for striking a gong, N, that is secured to the back ofthe box, as shown at I. Near the top of the box, and screwed to the backthereof, is a spring, 0, the free end of which rests on the upper edgeof, and serves to operate, the lever 1) whenever its end is releasedfrom the trip P.

The door B not only serves to exclude dust from the mechanism, but, whenlocked, precludes any tampering therewith.

The rear of the metal casing F is provided with an opening, (shown indotted lines at 122,) through which the trip projects when the door isclosed.

The apparatus is set, when the door is closed, by raising the free endof the lever l) and resting it on the upper horizontal edge of theprojecting trip, after which the bar H is pressed back to its utmostpoint, in which position it is securely held by the lower end of therocking lever engaging in its lower perforation, as shown in Fig. 1.

Any attempt to open the door will cause the free end of the lever 1) toride up the incline plane of the trip, and spring down over the end ofthe same, thereby causing the alarm to sound, and at the same timecausing the lower end of the hook at to strike the rocking-lever withsufficient force to cause its lower end to fiy out of the perforation inthe bar H, which, being released, will, by the action of the spring I,be driven forward, causing the match, as it passes over the roughenedsurface of the match-block, to ignite and fire the wick of the lamp.

Having described my invention, what I combination with a sliding bar, H,guidescc, claim as new, and desire to secure by Letters and rockinglever b, as described, and for the Patent, ispurpose set forth.

1. The combination, in a burglar-alarm, of In testimony whereof I havehereunto set a box, A, provided With casing F, gong N, my hand. lever D,hammer k, and spring 0, with a trip, P, as described, and for thepurpose set forth.

2. The lever D, provided with hook a, in

FRANK KRUPP. In presence of JOHN MULLER, J. H. KUNZ.

